Bump x/net to 0.24 #2345

Job	Run time
Unit Test (knative/serving)	9m 40s
Unit Test (knative/networking)	4m 4s
Unit Test (knative/eventing)	13m 15s
Unit Test (knative/operator)	7m 6s
Unit Test (knative/client)	7m 19s
Unit Test (knative-extensions/eventing-autoscaler-keda)	5m 22s
Unit Test (knative-extensions/eventing-ceph)	5m 11s
Unit Test (knative-extensions/eventing-github)	5m 57s
Unit Test (knative-extensions/eventing-gitlab)	5m 9s
Unit Test (knative-extensions/eventing-kafka)	6m 52s
Unit Test (knative-extensions/eventing-kafka-broker)	9m 52s
Unit Test (knative-extensions/eventing-redis)	6m 12s
Unit Test (knative-extensions/kn-plugin-admin)	4m 45s
Unit Test (knative-extensions/net-certmanager)	4m 29s
Unit Test (knative-extensions/net-contour)	4m 57s
Unit Test (knative-extensions/net-istio)	6m 4s
Unit Test (knative-extensions/net-kourier)	4m 28s
	1h 50m 42s

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